HAZOP

Too bad we don't know where you are, who you are, why you need this information, and why you are not qualified to define this yourself.

Hazardous Areas Classification - North America

HAZARDOUS AREA TECHNICAL GUIDE

Most importantly: How to Search the Internet

Thanks for the document Lyn.

But there is no perticular information about how to calculate radius from source of release.

Check NEC article 500....it covers everything you need to know...

If it was that easy, we could have save a few hundred thousand dollars.

One program for doing this is ALOHA (Areal Location of Hazardous Atmospheres).

Tornado-

Help me please. I have used ALOHA numerous times in conjunction with CAMEO as part of Haz Ops. It was used to project anticipated vapor dispersions. I was unaware that it could be used to determine the classification of an electrical unit. I would appreciate it you could go into this a little further. Thanks

Good Luck. Old Salt

It can't, but the OP really seems not to be asking about electrical classification.

Tornado-

Thanks. I apparently misread what seemed like an ambiguous question. The part that threw me was his terminology. Hazardous classification was usually used in terms of electrical hazards and we used to use the term "effected area" for the plume area. Have to be squeaky clean and watch the terminology in the chemical industry! Don't want to create unnecessary scrutiny.

Good Luck, Old Salt

ALOHA

This has to be done by a competent person with the latest applicable standards, regardless of what country or hazardous area standards you are working to, it is not something you can just download off the internet.

The above point is also mentioned in the standards you should be working to, so go buy copies of the relevant standards before you kill someone or pay a consultant or inspector to perform the work for you.

_{Jack - Hazardous area equipment inspector}

From the responses thus far, I kind of believe we need to uncover the language barrier here. I think the OP is looking for something other then electrical. He/they posted in the wrong area possibly.

First of all, you need to study the basics by yourself, this is a very general and basic question.

LUV123

"Kindly guide me how to calculate hazardous area classification redius of perticulat source of release."

Kindly guide me how to calculate hazardous area classification radius for particulate source of release. (Right?)

In order to determine the information you are asking for it is required that you obtain, read, and understand the MSDS sheets for all chemicals being processed in the area of concern.

Only the chemical manufacturer can provide this information.

Once you identify all chemicals and their classification you would use the "worst case" criteria.

If you do not understand this it would be in your best interest to hire a very competetn consultant.

Good luck and stay safe.

The latest copy of Emergency Response Guidebook is a good resourse also.